Igneous, Metamorphic, And Sedimentary (Mixed Assemblage)

Unidentified weathered rock fragments

Likely mixed silicate rocks; specific identification requires testing

Quartz-bearing feldspar pegmatite (likely with mica/tourmaline)

Granitic pegmatite; chiefly quartz (SiO₂) and feldspar, with dark mica or tourmaline

Quartz with impurities or Host Rock

SiO2 (Silicon Dioxide) with mixed silicates

Granite Sand and Gravel Mix

Phaneritic Felsic Igneous Plutonic Assemblage

General river rock or weathered cobble

Mixed rock composition

Pink and Green Tourmaline (Tumbled)

Elbaite (Na(Li,Al)3Al6(BO3)3Si6O18(OH)4)

Sodalite and Calcite

Na8(Al6Si6O24)Cl2 (Sodalite) and CaCO3 (Calcite)

Pebble with dark mineral inclusion

Likely granitic or gneissic quartz–feldspar pebble with a mafic inclusion; exact identification requires testing

Graphite

Graphite (Carbon, C)

Mixed Mineral Bead Bracelet

Polycrystalline and Monocrystalline Silicates/Oxides (Quartz, Howlite, Hematite)

Garnet

Garnet-group silicate, likely almandine–spessartine; general formula X₃Y₂(SiO₄)₃

Dragon Blood Jasper

Epidote with Red Jasper (Quartz-rich aggregate)

Gneiss

Banded gneiss, typically quartz–feldspar–mica assemblage

Mixed Mineral Assortment (Pyrite, Kyanite, Agate, Jasper)

FeS2 (Pyrite), Al2SiO5 (Kyanite), SiO2 (Agate/Jasper)

Mixed Mineral Collection (with Titanium Aura Quartz)

Silicon Dioxide (SiO2) with metallic coatings and various silicates

Epidote in Quartz

Epidote (Ca2(Al2,Fe3+)3(SiO4)3(OH)) / Quartz (SiO2)

Granite or granitic gneiss pebble

Quartz–feldspar–mica aggregate; likely granite, possibly foliated gneiss

Tumbled purple-blue corundum, possibly sapphire

Corundum (Al₂O₃); blue-to-purple varieties are sapphire

Epidote (Unakite variety)

Epidosite (Metasomatic rock containing Ca2(Al,Fe)3(SiO4)3(OH))

Mixed Quartz and Aventurine Chips

Silicon Dioxide (SiO2) with various inclusions

Chakra Stone (Composite / Man-made Bonded Gemstones)

Composite of Quartz, Lapis Lazuli, Aventurine, Tiger's Eye, and Jasper (SiO2, (Na,Ca)8(AlSiO4)6(S,Cl,SO4,OH)2, etc.)

Epidote in Matrix (Unakite-like Rock Fragment)

Epidote (Ca2(Al,Fe)3(SiO4)3(OH)) / Altered Metamorphic Pebble

Lapis Lazuli (Low-grade)

Lapis Lazuli (Aggregate of Lazurite, Calcite, and Pyrite)

Unakite (or Epidote-rich Granite)

Unakite (Metamorphosed Granite consisting of Epidote, Orthoclase, and Quartz)

Glacially transported granite and gneiss boulders

Granite (quartz–feldspar–mica); banded specimens likely gneiss

Weathered basalt or mafic metavolcanic rock

Basalt, possibly altered to greenstone (chlorite–epidote–actinolite assemblage)

Dark gray crystalline rock, possibly basalt

Basalt (tentative; plagioclase–pyroxene–iron oxide assemblage)

Graphite

Graphite (Native Carbon, C)

Mixed polished rock/mineral specimens

Indeterminate from image; likely quartz-bearing material with iron-oxide staining and possibly mica-rich schist

Garnet crystals

Garnet-group silicates, likely almandine (Fe₃Al₂Si₃O₁₂)

Granite

Granite

Granite retaining-wall blocks

Granite, principally quartz, potassium feldspar, plagioclase, and mica

Vesuvianite (Idocrase)

Vesuvianite, Ca10(Mg,Fe)2Al4(SiO4)5(Si2O7)2(OH)4

Polished hematite

Hematite (Fe₂O₃), likely a tumbled iron-oxide specimen

Epidosite

Epidosite (composed primarily of Epidote and Quartz)

Mixed Tumbled Gemstones and River Rocks

Mixed Decorative Stones (predominantly Silicon Dioxide - SiO2 variants)

Chrysocolla on Matrix

Hydrated copper silicates ((Cu,Al)2H2Si2O5(OH)4·nH2O)

Tumbled granite or granitic gneiss

Granite/granitic gneiss, chiefly quartz, feldspar, and dark mica or amphibole

Graphite

Graphite (Native Carbon, C)

Sodalite

Sodalite (Na8(Al6Si6O24)Cl2)

Pegmatite (Granitic Pegmatite with Quartz, Mica, and Tourmaline/Biotite)

Pegmatite

Dark garnet-bearing metamorphic rock (probable garnet schist/amphibolite)

Garnet schist or garnet amphibolite; chiefly quartz, mica/amphibole, feldspar, and almandine–pyrope garnet